Unstreaming
按学生年龄(而不是学习能力)分组
🗣️ 情景例句
You'll never guess what I heard.
你永远也猜不到我听说了什么。
Mr. Jones spent his undergraduate days at Columbia.
琼斯先生在哥伦比亚大学渡过了他的大学时代。
If people don't stop polluting the seas and rivers, there will be no fish left.
如果人们不停止污染海洋和河流的行为，那么，就没有鱼会留下来了。